Your advanced code editor is loading.

The code implements a simple CLI tool named gotemplate that uses Go’s text/template package to process input text from standard input (stdin) and generate output to standard output (stdout). The tool takes optional key-value pairs as arguments, which can be used within the template to inject values.

Here’s a breakdown of the code’s functionality:

1. Parsing Command-Line Arguments:

• The main function parses command-line arguments, expecting them to be in the format <key>=<value>.
• It stores these key-value pairs in a map called kvs.
• If an argument doesn’t adhere to the expected format, it prints an error message to stderr and exits.

2. Template Generation:

• The generate function takes the input reader, output writer, and the data map (kvs) as arguments.
• It reads the input from the provided reader (typically stdin) into a byte buffer.
• It defines a FuncMap to add custom functions (include, indent, and trim) to the template.
• It parses the input text as a text/template and assigns the custom functions to it.
• Finally, it executes the template with the provided data (kvs) and writes the generated output to the specified writer (typically stdout).

3. Custom Functions:

• include(filename string): Reads the content of a file specified by filename and returns it as a string. This function allows templates to include other files within themselves.
• indent(numSpaces int, content string): Indents each line of the content string by numSpaces. Useful for formatting output.
• trim(content string): Removes leading and trailing whitespace from the content string.

Overall, this code provides a basic but useful CLI tool for processing text templates with optional data injection and custom formatting functions.